Textile machinery



A ril 15, 1941.

J. R. WYLIDE EH'AL TEXTILE mcHinERY Filed April 18, 1940 A'H" arm a gPatented Apr. 15, 1941 2,238,203 'rax'rlm momnaar Joseph Rowland Wyldeand William Williams, Spondon, near Derby, England, assignors toCelanese Corporation of America, a corporation of Delaware ApplicationApril 18, 1940, Serial No. 330,250 In Great Britain June 23, 1939 9Claims.

This invention relates to textile machinery and more particularly tospindles suitable for use in yarn twisting apparatus.

The invention is particularly applicable to the production of .yarns orthreads of high twist, especially crpe threads such as are used in themanufacture of natural or artificial silk crepe fabrics.

An apparatus for the production of such threads is described in U. S.Patent No. 1,784,581. According to that specification, yarns are drawnfrom a rotating supply package by a take-up package supported on andfrlctionally driven-by a drum, the yarn passing through a floating ring,disposed about the package supporting spindle below an annular flangesecured to the spindle. and thence through suitablethread guides to thetake-up package. The degree of twist imparted to the yarn is governed bythe rate of rotation of the supply package and the rate at which theyarn is drawn off by the take-up package, the higher the rate ofrotation of the supply package for a given rate of takeup of the yarn,the higher the degree of twist imparted to the yarn.

An object of the present invention is to improve the twist controllingelements of apparatus of the type described above, so as to produceyarns having more uniform twist.

According to the present invention a spindle adapted to support the yarnpackage to be rotated and protrude through the bore of the package,comprises a flange formed on the protruding end of the spindle, a ringdisposed loosely about the spindle between the end of the package andthe flange, between which ring and the flange the yarn passes duringoperation of the spindle, said ring having an inside diameter that isless than the diameter of the flange so as to be capable of being urgedtowards the flange under the pull of the yarn, and a thread guidedisposed substantially centrally near the end face of the flange on theside remote from the ring and capable of rotating independently of thespindle.

arate member provided with means for securing With this construction,the disposition of the rotatable thread guide near to the'end face ofthe flange causes thethread guide to constrain the yarn to make contactwith a' substantial portion of the surface of the flange while at thesame time allowing the yarn to move circumferentially round the flangeas the package rotates the member to the spindle; for example, themember may be provided with a screwed shank for engagement with a tappedhole provided in the end of the spindle, the screwed shank terminatingin a shoulder adapted to abut the end of the spindle so as to form anannular space between the spindle end and the flange for accommodationof-the loosely disposed ring. With the flange formed on a separatemember the member is conveniently bored axially throughout its length toform a bearing in which a cylindrical extension of the thread guide isfree to rotate, the tip of the extension protruding through the screwedshank and a washer being riveted to the extension to prevent the guidefrom coming out of the bore. Such unit construction lends itself to theapplication of the present invention to existing twisting apparatus atvery small cost.

The maximum diameter of the flange is preferably sufliciently less thanthat of the spindle to allow the package to be accommodated to be easilyslipped over the flange into position on the spindle.

By way of example a form of spindle according to the invention will nowbe described in greater detail with reference to the accompanying draw-Figure 1 is a diagrammatic side elevation of a twisting apparatusemploying a spindle according to the invention;

Figure 2 is an enlargedview of the tip of the spindle shown. in Fig. 1;and

Figures -3 and 4 are alternative constructions of a thread guide.

Referring to Figs. 1 and 2, a take-up package I supported on andfrictionally driven by a drum 2 draws yarn 3 from a rotating bobbin 4supported on and driven by a spindle 5, the spindle S'being driven by abelt 6 passing over a whorl I on the base of the spindle.

The tip of the spindle'lis drilled axially to form a hole 8 which istapped for the reception of the screwed shank 9 of a member it having aflange I! of a proximately spheroidal shape and a cylindrical portion l3terminating in a shoulder l4 abutting the end of the spindle 5. Themember II is provided with an axial bore of a pigtail.

. l2 into position on the spindle.

During twisting the yarn 3 follows a balloon shaped path from therotating bobbin 4 to a ring 2| loosely. disposed about the cylindricalportion I3 of the member H, and then passes between the ring 2| and theflange l2, over the flange I2 to the rotatable guide H, which allows theyarn to travel circumferentially round the flange as it unwinds from therotating package 4, and thence over a substantially vertical path to afixed guide eye 22 from which it passes through a traversing guide 23 tothe take-up package I.

The pull exerted on the yarn 3 by the rotating take-up package I,coupled with the drag on the yarn arising from the rotation of thebobbin 4, causes the ring 2| to have a partial trapping effect on theyarn at the point where the yarn passes between the ring 2| and theflange l2. The thread guide I'I, being disposed centrally and near tothe end of the flange l2,

constrains the yarn to make contact with the surface of the flange |2'over a line extending from the point where the yarn passes between the'ring 2| and the flange |2 to the end of the flange, and the pull of thetake-up package urges the yarn in contact with the flange to pressagainst the flange to provide for smooth insertion of the twist.

The diameter of the spindle at the tip abutting the shoulder I4 isslightly greater than the inside diameter of the ring 2| to allow thering when not in use to rest on the tip of the spindle where the ringcan readily be lifted for the purpose of threading the yarn. I

As mentioned above the guide I! shown in Fig. 2, is made from wire bentinto the form Alternative forms of guide are shown in Figs. 3 and 4,these guides having wire stems 24 terminating in flattened pieces 25pierced to form eyes 26 through which the thread is passed.

Having described our invention what we desire to secure by LettersPatent is:

1. A twisting spindle adapted to support a yarn package to. be rotatedand protrude through the bore of the package, comprising a flange formedon the protruding end'of the spindle, a ring disposed loosely about thespindle between dle of a yarn twisting apparatus, comprising a flangedmember having a cylindrical body of smaller diameter than the flange, aring of smaller diameter than the flange loosely fitted around thecylindrical body, a thread guide rotatably mounted on the flanged memberwith its guide eye disposed substantiallycentrally near the end face ofthe flange on the side remote from the body, and means on the body forattaching the device to the spindle.

4. A twist controlling device according to claim 3, wherein the flangeis of approximately spheroidal shape.

5. A twist controlling device according to claim 3, wherein the threadguide comprises a length of wire twisted to form a pigtail guide eye.

6. A twisting spindle adapted to support a yarn package to be rotatedand protrude through the bore of the package, comprising a memberseparate from the spindle and provided with means for securing it to theend of the spindle, the member being formed with a flange, a ringdisposed loosely about the spindle between the end of the package andthe flange between which ring and the flange the yarn passes duringoperation of the spindle, said ring having an inside diameter that isless than the diameter of the flange so as to be capable of being urgedtowards the flange under the pull of the yarn, and a thread guidecarried by the spindle and disposed substantially centrally near the endface of the flange on the side remote from the ring, the guide beingcapable of rotating independently cf the spindle.

7. A twisting spindle adapted to support a yarn package to be rotatedand protrude through the bore of the package, comprising an axiallybored flange formed on the protruding end of the spindle, a ringdisposed loosely about the spindle between the end of the package andthe flange between which which ring and the flange the yarn passesduring operation of the spindle, said ring having an inside diameterthat is less than the diameter of the flange so as to be capable ofbeing urged towards the flange under the pull of the yarn, and a threadguide having a cylindrical extension freeto rotate in the bore of theflange, the guide being disposed substantially centrally near the endface of the flange on the side remote from the ring.

8. A spindle according to claim 7, wherein the thread guide comprises alength of wire twisted to form a pigtail guide eye.

the end of the package and the flange between a which ring and theflange the yarn passes during operation of the spindle, said ring havingan inside diameter that is less than the diameter of th flange so as-tobe capable of being dependently of the spindle.

2. A spindle according to claim L'Wherein the flange is of approximatelyspheroidal shape.

3. A twist controlling device adapted to be attached to the yarn packagesupporting spin- 9. A twisting spindle adapted to support a yarn packageto be rotated and protrude through the bore of the package, comprisinga. flange formed on the protruding end of the spindle and having a'diameter less than that of the spindle, a ring disposed loosely aboutthe spindle betweenthe end of the package and the flange between whichring and the flange the yarn passes during operation of the spindle,said ring having an inside diameter that is less than the diameter ofthe flange so as to be capable of being urged towards the flange underthe pull of the yarn, and a thread guide carried by the spindle anddisposed substantially centrally near the end face of the flange on theside remote from the ring, the guide being capable of rotatingindependentlyof the spindle.

JOSEPH ROWLAND WYLDE'. WILLIAM WILLQIAMS.

